Subtract 54/42 from 9/90
1st number: 9/90, 2nd number: 1 12/42
9/90 - 54/42 is -83/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
9/90 = 9 × 7/90 × 7 = 63/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
54/42 = 54 × 15/42 × 15 = 810/630 - Subtract the two like fractions:
63/630 - 810/630 = 63 - 810/630 = -747/630 - After reducing the fraction, the answer is -83/70
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